形貌和粒度对纳米二氧化铈光催化降解盐基品红的研究
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摘要
以Ce(NO3)3·6H2O为原料,通过水热法制备出不同粒径的球形和八面体纳米二氧化铈光催化剂,用紫外光催化降解盐基品红。结果表明,对于同一形貌的纳米颗粒,随着粒径的减小,光催化降解率逐渐增大;对于相同粒径纳米颗粒,八面体纳米二氧化铈比球形纳米二氧化铈的光催化降解率高。
The spherical and octahedral CeO_2 nanoparticles with different sizes were prepared by hydrothermal method using Ce( NO3)3·6 H2 O as raw material. The salt based magenta was degraded by ultraviolet light. The results show that the photocatalytic degradation rate of the nanoparticles with the decrease of particle size for the same morphology of nanoparticles,and the photocatalytic degradation rate of the octahedral nano-CeO_2 is higher than that of the spherical nano-CeO_2 for the nanoparticles of the same size.
The spherical and octahedral CeO_2 nanoparticles with different sizes were prepared by hydrothermal method using Ce( NO3)3·6 H2 O as raw material. The salt based magenta was degraded by ultraviolet light. The results show that the photocatalytic degradation rate of the nanoparticles with the decrease of particle size for the same morphology of nanoparticles,and the photocatalytic degradation rate of the octahedral nano-CeO_2 is higher than that of the spherical nano-CeO_2 for the nanoparticles of the same size.
引文
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[8] Zhang J,Ju X,Wu Z Y,et al. Structural characteristics of cerium oxide nanocrystals prepared by the microemulsion method[J]. Chemistry of Materials,2005,13(11):73-78.
[9] Gu S,Li W,Wang F,et al. Synthesis of buckhorn-like Bi VO4,with a shell of Ce Ox,nanodots:Effect of heterojunction structure on the enhancement of photocatalytic activity[J]. Applied Catalysis B Environmental,2015,170/171:186-194.
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[16]刘秀华. Ti O2纳米粒子薄膜对气相有机物的光催化降解研究[D].吉林:吉林大学,2001.
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[21]何丽芳,廖银念,陈礼敏,等.纳米Ce O2催化氧化甲苯的形貌效应研究[J].环境科学学报,2013,33(9):2412-2421.
[22] Li P,Zhou Y,Zhao Z,et al. Hexahedron prism-anchored octahedronal Ce O2:Crystal facet-based homojunction promoting efficient solar fuel synthesis[J]. Journal of the American Chemical Society,2015,137(30):9547-9550.
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